DEVICE SPECIFICATIONS NI 6254 M Series Data Acquisition: 32 AI, 1.25 MS/s, 48 DIO The following specifications are typical at 25 °C, unless otherwise noted. For more information about the NI 6254, refer to the M Series User Manual available at ni.com/ manuals. Analog Input Number of channels 16 differential or 32 single ended ADC resolution 16 bits DNL No missing codes guaranteed INL Refer to the AI Absolute Accuracy section Sample rate Single channel maximum 1.25 MS/s Multichannel maximum (aggregate) 1.00 MS/s Minimum No minimum Timing resolution 50 ns Timing accuracy 50 ppm of sample rate Input coupling DC Input range ±0.1 V, ±0.2 V, ±0.5 V, ±1 V, ±2 V, ±5 V, ±10 V Maximum working voltage for analog inputs (signal + common mode) ±11 V of AI GND CMRR (DC to 60 Hz) 100 dB Input impedance Device on AI+ to AI GND >10 GΩ in parallel with 100 pF AI- to AI GND >10 GΩ in parallel with 100 pF
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NI 6254 Device Specifications - National Instruments · DEVICE SPECIFICATIONS NI 6254 M Series Data Acquisition: 32 AI, 1.25 MS/s, 48 DIO The following specifications are typical
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DEVICE SPECIFICATIONS
NI 6254M Series Data Acquisition: 32 AI, 1.25 MS/s, 48 DIO
The following specifications are typical at 25 °C, unless otherwise noted. For moreinformation about the NI 6254, refer to the M Series User Manual available at ni.com/manuals.
Analog InputNumber of channels 16 differential or 32 single ended
ADC resolution 16 bits
DNL No missing codes guaranteed
INL Refer to the AI Absolute Accuracy section
Sample rate
Single channel maximum 1.25 MS/s
Multichannel maximum (aggregate) 1.00 MS/s
Minimum No minimum
Timing resolution 50 ns
Timing accuracy 50 ppm of sample rate
Input coupling DC
Input range ±0.1 V, ±0.2 V, ±0.5 V, ±1 V, ±2 V, ±5 V,±10 V
Maximum working voltage for analoginputs (signal + common mode)
NoiseUncertainty = RandomNoise ⋅ 3100 for a coverage factor of 3 σ and averaging
100 points.
AI Absolute Accuracy ExampleAbsolute accuracy at full scale on the analog input channels is determined using the followingassumptions:• TempChangeFromLastExternalCal = 10 °C• TempChangeFromLastInternalCal = 1 °C• number_of_readings = 100• CoverageFactor = 3 σ
For example, on the 10 V range, the absolute accuracy at full scale is as follows:GainError = 60 ppm + 13 ppm · 1 + 1 ppm · 10 = 83 ppmOffsetError = 20 ppm + 21 ppm · 1 + 60 ppm = 101 ppm
NoiseUncertainty = 280 µ� ⋅ 3100 = 84 µV
AbsoluteAccuracy = 10 V · (GainError) + 10 V · (OffsetError) + NoiseUncertainty =1,920 µV
Modes Analog edge triggering, analog edge triggeringwith hysteresis, and analog window triggering
Bandwidth (-3 dB)
AI <0..31> 3.4 MHz
APFI <0, 1> 3.9 MHz
Accuracy ±1%
APFI <0, 1> characteristics
Input impedance 10 kΩ
Coupling DC
Protection, power on ±30 V
Protection, power off ±15 V
Digital I/O/PFI
Static CharacteristicsNumber of channels 48 total, 32 (P0.<0..31>),
16 (PFI <0..7>/P1, PFI <8..15>/P2)
Ground reference D GND
Direction control Each terminal individually programmable asinput or output
Pull-down resistor 50 kΩ typical, 20 kΩ minimum
Input voltage protection ±20 V on up to two pins1
Waveform Characteristics (Port 0 Only)Terminals used Port 0 (P0.<0..31>)
Port/sample size Up to 32 bits
Waveform generation (DO) FIFO 2,047 samples
Waveform acquisition (DI) FIFO 2,047 samples
1 Stresses beyond those listed under Input voltage protection may cause permanent damage to thedevice.
6 | ni.com | NI 6254 Device Specifications
DI Sample Clock frequency 0 MHz to 10 MHz, system and bus activitydependent
DO Sample Clock frequency
Regenerate from FIFO 0 MHz to 10 MHz
Streaming from memory 0 MHz to 10 MHz, system and bus activitydependent
Data transfers DMA (scatter-gather), interrupts,programmed I/O
DI or DO Sample Clock source2 Any PFI, RTSI, AI Sample or Convert Clock,Ctr n Internal Output, and many other signals
PFI/Port 1/Port 2 FunctionalityFunctionality Static digital input, static digital output,
timing input, timing output
Timing output sources Many AI, counter, DI, DO timing signals
Debounce filter settings 125 ns, 6.425 µs, 2.56 ms, disable; high andlow transitions; selectable per input
Recommended Operating Conditions
Level Minimum Maximum
Input high voltage (VIH) 2.2 V 5.25 V
Input low voltage (VIL) 0 V 0.8 V
Output high current (IOH) P0.<0..31> — -24 mA
Output high current (IOH) PFI <0..15>/P1/P2 — -16 mA
Output low current (IOL) P0.<0..31> — 24 mA
Output low current (IOL) PFI <0..15>/P1/P2 — 16 mA
Electrical Characteristics
Level Minimum Maximum
Positive-going threshold (VT+) — 2.2 V
Negative-going threshold (VT-) 0.8 V —
2 The digital subsystem does not have its own dedicated internal timing engine. Therefore, a sampleclock must be provided from another subsystem on the device or an external source.
Routing options for inputs Any PFI, RTSI, PXI_TRIG, PXI_STAR,analog trigger, many internal signals
FIFO 2 samples
Data transfers Dedicated scatter-gather DMA controller foreach counter/timer; interrupts;programmed I/O
Frequency GeneratorNumber of channels 1
Base clocks 10 MHz, 100 kHz
Divisors 1 to 16
Base clock accuracy 50 ppm
Output can be available on any output PFI or RTSI terminal.
Phase-Locked Loop (PLL)Number of PLLs 1
Reference signal PXI_STAR, PXI_CLK10, RTSI <0..7>
Output of PLL 80 MHz Timebase; other signals derived from80 MHz Timebase including 20 MHz and100 kHz Timebases
External Digital TriggersSource Any PFI, RTSI, PXI_TRIG, PXI_STAR
Polarity Software-selectable for most signals
Analog input function Start Trigger, Reference Trigger,Pause Trigger, Sample Clock, Convert Clock,Sample Clock Timebase
10 | ni.com | NI 6254 Device Specifications
Counter/timer function Gate, Source, HW_Arm, Aux, A, B, Z,Up_Down
Digital waveform generation (DO)function
Sample Clock
Digital waveform acquisition (DI)function
Sample Clock
Device-to-Device Trigger BusPCI RTSI <0..7>3
PXI PXI_TRIG <0..7>, PXI_STAR
Output selections 10 MHz Clock, frequency generator output,many internal signals
Debounce filter settings 125 ns, 6.425 μs, 2.56 ms, disable; high andlow transitions; selectable per input
Bus InterfacePCI/PXI 3.3 V or 5 V signal environment
DMA channels 6, can be used for analog input, digital input,digital output, counter/timer 0, counter/timer 1
The PXI device supports one of the following features:• May be installed in PXI Express hybrid slots• Or, may be used to control SCXI in PXI/SCXI combo chassis
Table 3. PXI/SCXI Combo and PXI Express Chassis Compatibility
M Series Part NumberSCXI Control in PXI/SCXI
Combo ChassisPXI Express Hybrid Slot
Compatible
191325D-02/191325E-03L No Yes
191325C-0x/191325B-0x Yes No
3 In other sections of this document, RTSI refers to RTSI <0..7> for the PCI devices orPXI_TRIG <0..7> for PXI devices.
Power RequirementsCurrent draw from bus during no-load condition4
+5 V 0.03 A
+3.3 V 0.725 A
+12 V 0.35 A
Current draw from bus during AI overvoltage condition4
+5 V 0.03 A
+3.3 V 1.2 A
+12 V 0.38 A
Current LimitsCaution Exceeding the current limits may cause unpredictable behavior by thedevice and/or PC/chassis.
PCI
+5 V terminal (connector 0) 1 A maximum5
+5 V terminal (connector 1) 1 A maximum5
PXI
+5 V terminal (connector 0) 1 A maximum5
+5 V terminal (connector 1) 1 A maximum5
P0/PFI/P1/P2 and +5 V terminalscombined
2 A maximum
Physical CharacteristicsDimensions
PCI printed circuit board 10.6 cm × 15.5 cm (4.2 in. × 6.1 in.)
PXI printed circuit board Standard 3U PXI
4 Does not include P0/PFI/P1/P2 and +5 V terminals.5 Older revisions have a self-resetting fuse that opens when current exceeds this specification. Newer
revisions have a traditional fuse that opens when current exceeds this specification. This fuse is notcustomer-replaceable; if the fuse permanently opens, return the device to NI for repair.
12 | ni.com | NI 6254 Device Specifications
Weight
PCI 152 g (5.3 oz)
PXI 222 g (7.8 oz)
I/O connectors 2 68-pin VHDCI
CalibrationRecommended warm-up time 15 minutes
Calibration interval 2 years
Maximum Working VoltageMaximum working voltage refers to the signal voltage plus the common-mode voltage.
Channel-to-earth 11 V, Measurement Category I
Measurement Category I is for measurements performed on circuits not directly connected tothe electrical distribution system referred to as MAINS voltage. MAINS is a hazardous liveelectrical supply system that powers equipment. This category is for measurements of voltagesfrom specially protected secondary circuits. Such voltage measurements include signal levels,special equipment, limited-energy parts of equipment, circuits powered by regulated low-voltage sources, and electronics.
Caution Do not use for measurements within Categories II, III, or IV.
Note Measurement Categories CAT I and CAT O (Other) are equivalent. These testand measurement circuits are not intended for direct connection to the MAINSbuilding installations of Measurement Categories CAT II, CAT III, or CAT IV.
SafetyThis product is designed to meet the requirements of the following electrical equipment safetystandards for measurement, control, and laboratory use:• IEC 61010-1, EN 61010-1• UL 61010-1, CSA 61010-1
Note For UL and other safety certifications, refer to the product label or the OnlineProduct Certification section.
Electromagnetic CompatibilityThis product meets the requirements of the following EMC standards for electrical equipmentfor measurement, control, and laboratory use:• EN 61326-1 (IEC 61326-1): Class A emissions; Basic immunity• EN 55011 (CISPR 11): Group 1, Class A emissions• EN 55022 (CISPR 22): Class A emissions• EN 55024 (CISPR 24): Immunity• AS/NZS CISPR 11: Group 1, Class A emissions• AS/NZS CISPR 22: Class A emissions• FCC 47 CFR Part 15B: Class A emissions• ICES-001: Class A emissions
Note In the United States (per FCC 47 CFR), Class A equipment is intended foruse in commercial, light-industrial, and heavy-industrial locations. In Europe,Canada, Australia and New Zealand (per CISPR 11) Class A equipment is intendedfor use only in heavy-industrial locations.
Note Group 1 equipment (per CISPR 11) is any industrial, scientific, or medicalequipment that does not intentionally generate radio frequency energy for thetreatment of material or inspection/analysis purposes.
Note For EMC declarations and certifications, and additional information, refer tothe Online Product Certification section.
CE Compliance This product meets the essential requirements of applicable European Directives, as follows:• 2014/35/EU; Low-Voltage Directive (safety)• 2014/30/EU; Electromagnetic Compatibility Directive (EMC)• 2011/65/EU; Restriction of Hazardous Substances (RoHS)
14 | ni.com | NI 6254 Device Specifications
Online Product CertificationRefer to the product Declaration of Conformity (DoC) for additional regulatory complianceinformation. To obtain product certifications and the DoC for this product, visit ni.com/certification, search by model number or product line, and click the appropriate link in theCertification column.
Environmental ManagementNI is committed to designing and manufacturing products in an environmentally responsiblemanner. NI recognizes that eliminating certain hazardous substances from our products isbeneficial to the environment and to NI customers.
For additional environmental information, refer to the Minimize Our Environmental Impactweb page at ni.com/environment. This page contains the environmental regulations anddirectives with which NI complies, as well as other environmental information not included inthis document.
Waste Electrical and Electronic Equipment (WEEE)EU Customers At the end of the product life cycle, all NI products must bedisposed of according to local laws and regulations. For more information abouthow to recycle NI products in your region, visit ni.com/environment/weee.
电子信息产品污染控制管理办法(中国 RoHS)中国客户 National Instruments 符合中国电子信息产品中限制使用某些有害物
质指令(RoHS)。关于 National Instruments 中国 RoHS 合规性信息,请登录
ni.com/environment/rohs_china。(For information about China RoHScompliance, go to ni.com/environment/rohs_china.)
Refer to the NI Trademarks and Logo Guidelines at ni.com/trademarks for information on NI trademarks. Other product andcompany names mentioned herein are trademarks or trade names of their respective companies. For patents covering NIproducts/technology, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your media, or theNational Instruments Patent Notice at ni.com/patents. You can find information about end-user license agreements (EULAs)and third-party legal notices in the readme file for your NI product. Refer to the Export Compliance Information at ni.com/legal/export-compliance for the NI global trade compliance policy and how to obtain relevant HTS codes, ECCNs, and otherimport/export data. NI MAKES NO EXPRESS OR IMPLIED WARRANTIES AS TO THE ACCURACY OF THE INFORMATIONCONTAINED HEREIN AND SHALL NOT BE LIABLE FOR ANY ERRORS. U.S. Government Customers: The data contained inthis manual was developed at private expense and is subject to the applicable limited rights and restricted data rights as set forthin FAR 52.227-14, DFAR 252.227-7014, and DFAR 252.227-7015.